Question

Calcule o valor de (x + y + z)^2

Answer 1

Explicação passo-a-passo:

(x+y+z)²=(x+y+z).(x+y+z)

(x+y+z)²=x.(x+y+z)+y.(x+y+z)+z.(x+y+z)

(x+y+z)²=x²+xy+xz+xy+y²+yz+xz+yz+z²

(x+y+z)²=x²+y²+z²+2xy+2xz+2yz